Thursday, December 14, 2017

This is an open source car trip computer based on the popular Arduino platform.It calculates trip information such as fuel consumption, cost, remaining fuel, miles per gallon, miles per tank and also displays OBD parameters.OBDuino.caIt first started as of 2008 based on the MPGuino project to get an open source platform for hobbyists to connect to the OBD standard.

Saturday, December 9, 2017

This day I'm using the speech recognition module with Arduino UNO.My wife has brought me this Arduino Module as my birthday gift. I'll show you how it can be used.

It can be connected to Arduino or to any other Microcontroller through serial port.

It can also be connected to the standard PC through its serial port but through a TTL converter. Since a standard PC serial port sends and receives RS232 signals (+12v and -12 v) but this module handles TTL signals ( 0 and +5 v )

You can control this module through HEX Format commands or through Arduino libraries associated with it.

First, I had to configure it using USB port in my laptop through this FOCA circuit which converts USB signals to TTL signals.

Then I could use Arduino libraries to initialize the module and load it with speech commands.

The module can store up to 80 voice commands. Then it can differentiate between each one and send signals to Arduino upon command recognition.

Friday, December 1, 2017

I've previously thought of making a capacitive touch sensor that works as touch switch using the PIC 16F84A Microcontroller.I had a lamp that works using capacitive touch as a switch and it gave me the idea.When I worked with the microcontroller and there was some error or bad connection in hardware circuit I noticed that the microcontroller showed irregular behavior during touching it when reading zeros and ones inputs to the GPIOs.Here's how I got the idea of using the microcontroller as a touch sensor.I've tried to make the circuit and code it myself but I had unreliable results. I thought that the idea was wrong and would never work.When I searched for it online I found a video showing how it worked so good. I wanted to share it with you.I found it on this blog:http://diytronics.blogspot.com.eg/2011/05/capacitive-touch-sensor-for-pic16f84a.htmlI'll try it and will make some modification to it.I'll also add a photo of my own circuit.